Thied to



(No Model.) d g v W. SGHMIMPF.

GIRGULATING BIL-BR.

Patented S'ept.- 8,` 1-885,

,m MM

r il ru nmgage l uy lil WITJV'ESAS'ES v .Attorney N: PETERS.Pham-umnpmr. wmingm. u c,

vis formed with a suitable feed-opening, c, and

UNITED STATES PATENT OFFICE,

WILLIAM SOHIMPF, OF SHENANDOAH,PENNSYLVANIA, ASSIGN OR OF ONE- THIRDTOO. `A.`l KEIM, OF SAME PLACE.

cmcuLA'i-ltic#Bonnin.

SPECIFICATION `forming part of Letters Patent No. 325,977, datedSeptember 8, 1885.

Application ined May 11, 1885. (Nmqdeii To @ZZ whom it may concern.' A

Beit known that I, WILLIAM SOHIMPF, of Shenandoah, in thev county ofSchuylkill and State of Pennsylvania, have invented certain new anduseful Improvements in Circulating- Boilers; and I do hereby declare thefollowing to bea full, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertainsto'make and use the saine.

My invention relates to circulating-boilers adapted, primarily, forsteam heating apparatus, the object being to provide a construction ofboiler that will greatly facilitate the heating of the water'andgeneration of steam.

The invention consists in the features of construction and combinationsof parts hereinafter fully described, and pointed out in the claim.

In the accompanying drawings, Figure 1 represents an end view, partly insection, of a boiler constructed in accordance with my invention. Figs.2 and 3 illustrate parts in detail.

A represents the outer jacketor casing`of the boiler, provided with asmoke-exit, a.

The're-box B is preferably circular or cylindrical in form, and consistsof an inner shellG, and an outer shell, C. These shells are securedtogether at top and bottom by rings D, to which the shells are rivetedto form an annular water-space, E. vThe tire-box door F, said openingbeing bounded by a frame, f, secured in a water-tight manner to theshells of the box.

G represents the boiler proper,larranged above the fire-box, and formedwith downwardly-projecting eXtensionsg g, surrounding the fire-box.

Across the topof the re-box is arranged an inverted-T pipe, H, whosehorizontatpor- ,tion h communicates with the waterspace E of theflrebox, while its vertical portion h" extends linto the boi-ler.`

Y I I represent short transverse pipes connecting the lower portions ofthe boiler-exten sions g g with the adjacent parts' of the waterspaceoftherebox.

The boiler G is provided with a' steamexit, g. V

It will be apparent that the water contained in the annnlar'spacc E ofthe fire-box Will bev quickly heated and will readily pass or circulateto the boiler. As represented by the arrows inV the drawings, the tireand heat will pass downwardly around the boiler-extensions g g, andthence upwardly over the top ofthe boiler to the chimney a, thuspractically surrounding the boiler and its contained water and servingto quickly generate steam.

Having fully described my invention, WhatI claim as new, and desiretosecure by Letters Patent, is x In a circulating-boiler, thecombination, with the boiler having downwardly-projecting extensions, ofthe ire-box consisting of two shells and connectinglrings forming thewaterspace, an inverted-T formed pipe connecting the fire-box waterspace with the boiler propel', and side pipes connecting said waterspacewith the extended sides of the boiler, substantially as described.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

l XVM. SCHIMPF.

Witnesses:

C. F. HOLDERMAN, LEO A. BAMBERGER.

